Chairs and seats – Movable bottom – Tiltable
Patent
1989-06-16
1991-01-15
Aschenbrenner, Peter A.
Chairs and seats
Movable bottom
Tiltable
A47C 102
Patent
active
049848461
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a device in a chair, especially an adjustable chair comprising an articulation means between a seat member and a back rest member, so as to allow an alteration of the angular position therebetween.
PRIOR ART
A chair of this type is for example known from NO patent specification No. 125 836.
From SE published and printed specification No. 388 118 there is known such a chair having a back rest which is linked together with a seat member, the seat member on its lower side being equipped with straight metal hoops which can pass through a bearing cup provided fixedly on the chair frame, but pivotably in relation thereto. In order to maintain the chair in the sitting position having the back rest in an upright position there is on the metal hoop provided a wedge-shaped element wedging in the opening of the bearing cup.
From Finnish printed and published specification No. 72865 there is known a device for regulating and locking the back member of a chair, there being provided on the seat member a straight guiding rod which at its one end is linked together with the front portion of the seat, and which at its other end freely protrudes through a recess in a lockable bearing cup. The locking means comprises a handle which with its one end can be pivoted into and out of the recess in the bearing cup for thereby catching or releasing the guiding bar in the recess.
From German printed and published specification No. 2 104 944 there is known a flip up device which can be used in connection with larger and heavier chairs, for example chairs in cosmetic treatment, dentist chairs, etc., there being for the various slanted positions of the chair achieved the same point of gravity for the chair and the user relative to the subframe of the chair. There is used a curved guide rail which can move between rollers, and which resides in a box-shaped house mounted on the seat member of the chair. In various positions of the back rest member and of a person, the chair will adjust itself to a position in which the point of gravity is the same, since the seat member then will adjust itself such that the point of gravity will be right below the seat member.
However, nothing is said in this German publication about an articulation means between the seat member and the back rest member, let alone a pivot point on the back rest member around which the back rest member can be pivoted by the user in order to bring the back rest member to various angular positions, i.e. how various moments will be exercised by the body of the user depending on the inclination of the back rest member related to said pivot point, and how the seat member is to be displaced along a specific guiding path.
From EP-O No. 096 273-A3 there is known a chair, wherein the back rest member can be pivoted about a fixed point on the chair frame, the back rest member at the bottom being linked to the seat which can slide along a guide bearing. In a given embodiment the guide bearing may take the form of curved guiding elements which are mounted on the seat, and which are guided in corresponding tracks provided stationary on the chair frame.
From U.S. Pat. No. 4,607,883 and U.S. Pat. No. 4,660,884 there are also known chairs having an articulation means between a seat member and a back rest member. However, neither are there here given any instructions for how it is possible with simple expedients to provide a double sliding path rendering larger options as regards versatility in the application facilities
BRIEF DISCUSSION OF THE INVENTION
In view of this prior art an object of the present invention is to provide a device rendering larger possibilities for adjusting the force necessary for changing the relative position between seat member and back rest member, an objective of the invention also being to give instructions for a regulating mechanism which further improves the operational facilities of the chair.
In other words, the invention aims at providing a chair which so to say independently of the geometry
REFERENCES:
patent: 2271925 (1942-02-01), Niles
patent: 2522246 (1950-09-01), Armstrong
patent: 4452486 (1984-06-01), Zapf et al.
patent: 4504090 (1985-03-01), Goldman
patent: 4607883 (1986-08-01), Tzu-Chun
patent: 4660884 (1987-04-01), Terui et al.
Aschenbrenner Peter A.
J. E. Ekornes A/S
LandOfFree
Arrangement in an adjustable chair does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Arrangement in an adjustable chair, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement in an adjustable chair will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-51023